6 Suggested Answers

Hi,
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if the speedo still works then it will need a spedo unit if the speedo doesn't work it is either the cable or the gear in the trans to check the cable unthread from trans and attach a drill to the cable innereds spin the drill if the speedo does not move replace the speedo cable

Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Otherwise, guesswork. I have MANY ideas that could send you on a wild goose chase. I strongly suspect EMS (Engine Management System) sensor beginning to malfunction as it warms up. First strong suspicion is the crank position sensor (CKP) - however,usually always sets a DTC (i.e., P0335, P0336). The next suspicion is the Engine Coolant Temperature sensor. The ECM uses this sensor's signal to adjust fuel, timing, engine RPM, etc based on engine temp. If malfunctioning at a particuar point during engine warm up, it could be telling the ECM the temperature is LOWER or HIGHER than it ACTUALLY is, resulting in the ECM to increase fuel (flood it) or give it LESS fuel (starve it). If this malfunction lasts long enough, the ECM will usually set a DTC for that sensor circuit, either a Range/Performance code, or a "LOW Input" or "HIGH Input" code.

I just worked on a different model Hundai with the same sounding problem. I discovered that the starter was drawing to much voltage and starving the ignition system not allowing it to fire. I ran an amperage draw test and when it was discovered that it was the starter that was the culprit we replaced the starter with a rebuilt starter and it cured the intermitant starting problem. I hope this helps solve your problem.

i dont really have a solution but i have a 2002 Hyundai accent gs that wont start when it gets cold if its below 50 degrees out the car will crank but not start we have replaced everything the alternator,starter,battery,both coil pack,transmission,crank censor,oxygen censor,fuel pump relay, computer, and 100 amp alternator relay none of these things has fixed the car does any one know what else it could be

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Could be many things, but start with the basics. Use fuel pressure test gauge to check for leak down after shutting engine off. Could be leaky injectors. Could also be weak spark preventing fuel from complete burn--bad coil or ignition module. More likely bad coolant temp sensor making ECU think engine is still cold after it is warmed up. Another possibility is clogged exhaust.

Could be several things, check for spark at the spark plugs, if ok check fuel pressure and flow if ok, back probe injectors with a led test light, the light should flash while the motor is trying to start. if not check engine fuse.

The failure to start could be due to the Crank Timing Sensor. The sensor not working will stop the computer from knowing when the spark should be activated and the injection of the fuel should take place.
I hope this is the problem. and that you can find
This is only my opinion and It seems to fit the problem posted